DKMOCO 2PCS 23" Wide Heated Massage Stadium Seats for Bleachers with Back Support, Portable Stadium Chair with Armrest, for Outdoor and Events(WITHOUT BATTERY)

[Power Bank Requirement]5V3A or above

[Maximum Temperature]130Fahrenheit degree

[Power Source]USB

[Power Bank Included]No

[Massage Function]Backrest vibration massage

[Total Massage Levels]6 (3 intensity levels ¡Á 2 modes each)

[Lumbar Support]Included pillow

[Seat Width (Armrests Up)]18 inches(Armrests Up), 23 inches(Armrests Down)

[Securement Methods]2 (bottom strap + 2 hooks)

[Hook Location]Below bottom

[Surface Material]Waterproof polyester and 600D Oxford cloth

[Package Include]?2x 23 inch Stadium Seat, 1x Manual